{"id":"CVE-2022-50282","state":"PUBLISHED","title":"chardev: fix error handling in cdev_device_add()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nchardev: fix error handling in cdev_device_add()\n\nWhile doing fault injection test, I got the following report:\n\n------------[ cut here ]------------\nkobject: '(null)' (0000000039956980): is not initialized, yet kobject_put() is being called.\nWARNING: CPU: 3 PID: 6306 at kobject_put+0x23d/0x4e0\nCPU: 3 PID: 6306 Comm: 283 Tainted: G        W          6.1.0-rc2-00005-g307c1086d7c9 #1253\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\nRIP: 0010:kobject_put+0x23d/0x4e0\nCall Trace:\n <TASK>\n cdev_device_add+0x15e/0x1b0\n __iio_device_register+0x13b4/0x1af0 [industrialio]\n __devm_iio_device_register+0x22/0x90 [industrialio]\n max517_probe+0x3d8/0x6b4 [max517]\n i2c_device_probe+0xa81/0xc00\n\nWhen device_add() is injected fault and returns error, if dev->devt is not set,\ncdev_add() is not called, cdev_del() is not needed. Fix this by checking dev->devt\nin error path.","publishedAt":"2025-09-15T14:21:18.658Z","updatedAt":"2026-05-23T15:24:07.483Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"da97a80a657d1b1b50ef633e8ff5dbf0d417fc8d","status":"affected","lessThan":"5d2146889fad4cb9e6c13e790d4cfd871486eca8","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"6acf8597c5b04f455ee0649e11e5f3bcd28f381e","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"34d17b39bceef25e4cf9805cd59250ae05d0a139","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"d85b5247a79355b8432bfd9ac871f96117f750d4","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"c46db6088bccff5115674d583fef46ede80077a2","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"28dc61cc49c6e995121c6d86bef4b73df78dda80","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"b5de1eac71fec1af7723f1083d23a24789fd795c","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"85a5660491b507d33662b8e81c142e6041e642eb","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797","versionType":"git"},{"version":"f78b54e7d83c7879f9a6e49e6724019ca34177cc","status":"affected","versionType":"git"},{"version":"d79d7d5c878809964da537336dad5ff55fa1605e","status":"affected","versionType":"git"},{"version":"4.9.224","status":"affected","lessThan":"4.9.337","versionType":"semver"},{"version":"3.16.83","status":"affected","lessThan":"3.17","versionType":"semver"},{"version":"4.4.224","status":"affected","lessThan":"4.5","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/char_dev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"4.9.337","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.86","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.16","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.2","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/char_dev.c"]}],"references":["https://git.kernel.org/stable/c/5d2146889fad4cb9e6c13e790d4cfd871486eca8","https://git.kernel.org/stable/c/6acf8597c5b04f455ee0649e11e5f3bcd28f381e","https://git.kernel.org/stable/c/34d17b39bceef25e4cf9805cd59250ae05d0a139","https://git.kernel.org/stable/c/d85b5247a79355b8432bfd9ac871f96117f750d4","https://git.kernel.org/stable/c/c46db6088bccff5115674d583fef46ede80077a2","https://git.kernel.org/stable/c/28dc61cc49c6e995121c6d86bef4b73df78dda80","https://git.kernel.org/stable/c/b5de1eac71fec1af7723f1083d23a24789fd795c","https://git.kernel.org/stable/c/85a5660491b507d33662b8e81c142e6041e642eb","https://git.kernel.org/stable/c/11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50282.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50282","state":"PUBLISHED","datePublished":"2025-09-15T14:21:18.658Z","dateUpdated":"2026-05-23T15:24:07.483Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-15T13:58:00.976Z"},"containers":{"cna":{"title":"chardev: fix error handling in cdev_device_add()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nchardev: fix error handling in cdev_device_add()\n\nWhile doing fault injection test, I got the following report:\n\n------------[ cut here ]------------\nkobject: '(null)' (0000000039956980): is not initialized, yet kobject_put() is being called.\nWARNING: CPU: 3 PID: 6306 at kobject_put+0x23d/0x4e0\nCPU: 3 PID: 6306 Comm: 283 Tainted: G        W          6.1.0-rc2-00005-g307c1086d7c9 #1253\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\nRIP: 0010:kobject_put+0x23d/0x4e0\nCall Trace:\n <TASK>\n cdev_device_add+0x15e/0x1b0\n __iio_device_register+0x13b4/0x1af0 [industrialio]\n __devm_iio_device_register+0x22/0x90 [industrialio]\n max517_probe+0x3d8/0x6b4 [max517]\n i2c_device_probe+0xa81/0xc00\n\nWhen device_add() is injected fault and returns error, if dev->devt is not set,\ncdev_add() is not called, cdev_del() is not needed. Fix this by checking dev->devt\nin error path."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"da97a80a657d1b1b50ef633e8ff5dbf0d417fc8d","status":"affected","lessThan":"5d2146889fad4cb9e6c13e790d4cfd871486eca8","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"6acf8597c5b04f455ee0649e11e5f3bcd28f381e","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"34d17b39bceef25e4cf9805cd59250ae05d0a139","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"d85b5247a79355b8432bfd9ac871f96117f750d4","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"c46db6088bccff5115674d583fef46ede80077a2","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"28dc61cc49c6e995121c6d86bef4b73df78dda80","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"b5de1eac71fec1af7723f1083d23a24789fd795c","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"85a5660491b507d33662b8e81c142e6041e642eb","versionType":"git"},{"version":"233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0","status":"affected","lessThan":"11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797","versionType":"git"},{"version":"f78b54e7d83c7879f9a6e49e6724019ca34177cc","status":"affected","versionType":"git"},{"version":"d79d7d5c878809964da537336dad5ff55fa1605e","status":"affected","versionType":"git"},{"version":"4.9.224","status":"affected","lessThan":"4.9.337","versionType":"semver"},{"version":"3.16.83","status":"affected","lessThan":"3.17","versionType":"semver"},{"version":"4.4.224","status":"affected","lessThan":"4.5","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/char_dev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"4.9.337","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.86","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.16","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.2","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/char_dev.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/5d2146889fad4cb9e6c13e790d4cfd871486eca8"},{"url":"https://git.kernel.org/stable/c/6acf8597c5b04f455ee0649e11e5f3bcd28f381e"},{"url":"https://git.kernel.org/stable/c/34d17b39bceef25e4cf9805cd59250ae05d0a139"},{"url":"https://git.kernel.org/stable/c/d85b5247a79355b8432bfd9ac871f96117f750d4"},{"url":"https://git.kernel.org/stable/c/c46db6088bccff5115674d583fef46ede80077a2"},{"url":"https://git.kernel.org/stable/c/28dc61cc49c6e995121c6d86bef4b73df78dda80"},{"url":"https://git.kernel.org/stable/c/b5de1eac71fec1af7723f1083d23a24789fd795c"},{"url":"https://git.kernel.org/stable/c/85a5660491b507d33662b8e81c142e6041e642eb"},{"url":"https://git.kernel.org/stable/c/11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:24:07.483Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9.224","versionEndExcluding":"4.9.337"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.14.303"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.19.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.4.229"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.10.163"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.15.86"},{"vulnerable":true,"criteria":"cpe:2.3:o: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